#!/bin/bash

parser="$(echo $PWD | rev)"
IFS="
"

partist="$(echo $parser | cut -f 2 -d '/' | rev)"
palbum="$(echo $parser | cut -f 1 -d '/' | rev)"
pgenre="$(echo $parser | cut -f 3 -d '/' | rev)"

if [ "$partist" == "" ] || [ "$palbum" == "" ] || [ "$pgenre" == "" ]; then
    echo "This script expects a format of "'$MUSICBASEPATH'"/Genre/Artist/Album/Song.ext"
    exit;
fi
echo Expected metadata:
echo Artist: $partist
echo Album: $palbum
echo Genre: $pgenre
echo

for i in $@; do
    echo Checking "$i"
    if [ ! -f "$i" ]; then
        echo File doesn\'t exist. $i
        continue;
    fi
    fartist="$(exiftool -Artist "$i" | sed 's/^Artist\s\+:\s\+//')"
    falbum="$(exiftool -Album "$i" | sed 's/^Album\s\+:\s\+//')"
    fgenre="$(exiftool -Genre "$i" | sed 's/^Genre\s\+:\s\+//')"
    unset tags
    if [ "$partist" != "$fartist" ] || [ "$falbum" != "$palbum" ] || [ "$fgenre" != "$pgenre" ]; then
        echo Found artist \[$fartist\]
        echo Found album \[$falbum\]
        echo Found genre \[$fgenre\]
        echo Updating...
        mid3v2 -a "$partist" -A "$palbum" -g "$pgenre" "$i" &>/dev/null
        echo
    fi
done